Is a genus of flowering plants well known for their use as herbal medicine, commonly as an herbal tea.
Villous-lanate annual up to 30 cm. Stem eglandular. Leaves 10-25 x 5-12 mm, oblong-ovate, dentate or crenate-dentate. Verticillasters c. 6-flowered, distant. Calyx 6-10 mm, 2-lipped; upper tooth broadly ovate, lower lanceolate, all with a straight, pungent apex. Corolla 7-10 mm, yellow, white or purple, equalling or slightly exceeding calyx.
This plant is useful.
How to get rid of: